I was making the distinction between Matsumuras' Seisan and Hagashionna's SeiSan. I know both, I like the Goju-ryu verison better and I would its my base, but I enjoy exploring the Bunkia of both. Actually when you compare the Bunkia shown to me and even the Kata Goju-Kia's Seisan it is different then Okinawans Goju-ryu's which has more Gung-fu like smaller circle moves. The floor pattern near the same but not hands.

From what I understand of course Bushi Matsumura's version is older and there more verison then these 2 or 3. I'd like to do a side by side comparison with Isshin-ryu's Seisan. Shito-ryu is almost the same as Goju-ryu with very small differences.

Seisan may rival Paisia as one of the oldest Katas on Ryukyu Islands, As you know.

My Sensei said Seisan was my best Kata, I like Seipa and Superinpei better.

I favor and know best Naifanchi and Wansu. Particularly wansu, undergoing an intensive and exclusive bunkai study of the kata over the last year and a half or so, extracting and documenting over 40 oyo from the form.

And for the youngest/children we have a pattern which is a standard I pattern (NOT a kata) with some particular ~flavorings~ undergoing careful scrutiny and likely imminant changes. We have several weapons kata as well, but your question was specific to the empty handed materials.

Favorite, got me... love them all. Chinto I suppose, but Seisan, Tensho take your pick... none are bad, all enjoyable.